sigma a transport layer mobility management scheme for terrestrial and space networks

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1、e-BusinessandTelecommunicationNetworkseditedbyJoãoAscensoISEL,Lisbon,PortugalLuminitaVasiuUniversityofWestminster,London,UKUKCarlosBeloIST/IT,Lisbon,PortugalandMónicaSaramagoINSTICC,Setúbal,PortugalSIGMA:ATRANSPORTLAYERMOBILITYMANAGEMENT∗SCHEMEFORTERRESTRIALANDSPACENETWORKSShaoj

2、ianFuandMohammedAtiquzzamanTelecommunicationsandNetworksResearchLabSchoolofComputerScience,UniversityofOklahoma,Norman,OK73019-6151,USAEmail:{sfu,atiq}@ou.eduKeywords:InternetMobility,MobilityManagement,WirelessNetworks,Handoffmanagement.Abstract:MobileIPhasbeendevelopedtohandle

3、mobilityofInternethostsatthenetworklayer.MobileIPsuffersfromanumberofdrawbackssuchasrequirementofinfrastructurechange,highhandoverlatency,highpacketlossrate,andconflictwithnetworksecuritysolutions.Inthispaper,wedescribethearchitectureofSeamlessIPdiversity-basedGeneralizedMobility

4、Architecture(SIGMA)-anewmobilitymanagementscheme.SIGMAutilizesIPdiversitytoachieveseamlesshandover,andisdesignedtosolvemanyofthedrawbacksofMobileIP,includingrequirementforchangesininfrastructure.ThesurvivabilityandsecurityofSIGMAisevaluatedandshownthatSIGMAhasahighersurvivabilit

5、ythanMobileIP-thankstoitscentralizedlocationmanagementscheme.SIGMAcaninteroperatewithexistingnetworksecurityinfrastructuressuchasIngressfilteringandIPSecfairlyeasily.WealsoshowtheapplicationofSIGMAtomanagesatellitehandoversinspacenetworks.1INTRODUCTIONMIPisknowntohaveconflictwithn

6、etworksecu-ritysolutions(Perkins,1998).BaseMIPdoesnotco-MobileIP(MIP)(Perkins,2002;Perkins,1998)hasoperatewellwhentheHAisbehindafirewallandthebeendesignedtohandlemobilityofInternethostsatMHisoutsidethefirewall,unlessfirewalltransver-thenetworklayer.ItallowsaTCPconnectiontosalsoluti

7、on(MontenegroandGupta,1998)isused.remainaliveandreceivepacketswhenaMobileMoreover,baseMIPhasdifficultyinthepresenceofHos(MH)tmovesfromonepointofattachmenttoaforeignnetworkwhichimplementsingressfiltering,anotherSeveraldrawbacksexistwhenusingMIPinunlessreversetunnelling,wheretheHA’s

8、IPaddressamobilecomputingenvironment,themostimp